Executive branch:
chief of state: Supreme Leader Ayatollah Ali Hoseini-KHAMENEI (since 4 June 1989)
head of government: President Mahmud AHMADI-NEJAD (since 3 August 2005) First Vice President Parviz DAVUDI (since 11 September 2005)
cabinet: Council of Ministers selected by the president with legislative approval; the Supreme Leader has some control over appointments to the more sensitive ministries
elections: leader of the Islamic Revolution appointed for life by the Assembly of Experts; president elected by popular vote for a four-year term; election last held 17 June 2005 with a two-candidate runoff on 24 June 2005 (next to be held NA 2009)
election results: Mahmud AHMADI-NEJAD elected president; percent of vote - Mahmud AHMADI-NEJAD 62%, Ali Akbar Hashemi RAFSANJANI 36%; note - 2% of ballots spoiled

Capital:
Tehran

Population:
68,017,860 (July 2005 est.)

Languages:
Persian and Persian dialects 58%, Turkic and Turkic dialects 26%, Kurdish 9%, Luri 2%, Balochi 1%, Arabic 1%, Turkish 1%, other 2%

Location:
Middle East, bordering the Gulf of Oman, the Persian Gulf, and the Caspian Sea, between Iraq and Pakistan

Climate:
mostly arid or semiarid, subtropical along Caspian coast

Land boundaries:
total: 5,440 km
border countries: Afghanistan 936 km, Armenia 35 km, Azerbaijan-proper 432 km, Azerbaijan-Naxcivan exclave 179 km, Iraq 1,458 km, Pakistan 909 km, Turkey 499 km, Turkmenistan 992 km

Background:
Known as Persia until 1935, Iran became an Islamic republic in 1979 after the ruling monarchy was overthrown and the shah was forced into exile. Conservative clerical forces established a theocratic system of government with ultimate political authority nominally vested in a learned religious scholar. Iranian-US relations have been strained since a group of Iranian students seized the US Embassy in Tehran on 4 November 1979 and held it until 20 January 1981. During 1980-88, Iran fought a bloody, indecisive war with Iraq that eventually expanded into the Persian Gulf and led to clashes between US Navy and Iranian military forces between 1987-1988. Iran has been designated a state sponsor of terrorism for its activities in Lebanon and elsewhere in the world and remains subject to US economic sanctions and export controls because of its continued involvement. Following the elections of a reformist president and Majlis in the late 1990s, attempts to foster political reform in response to popular dissatisfaction floundered as conservative politicians prevented reform measures from being enacted, increased repressive measures, and made electoral gains against reformers. Parliamentary elections in 2004 and the August 2005 inauguration of a conservative stalwart as president, completed the reconsolidation of conservative power in Iran's government.

Administrative divisions:
30 provinces

International organization participation:
ABEDA, CP, ECO, FAO, G-15, G-24, G-77, IAEA, IBRD, ICAO, ICC, ICCt (signatory), ICRM, IDA, IDB, IFAD, IFC, IFRCS, IHO, ILO, IMF, IMO, Interpol, IOC, IOM, ISO, ITU, MIGA, NAM, OIC, OPCW, OPEC, PCA, SCO (observer), UN, UNCTAD, UNESCO, UNHCR, UNIDO, UNMEE, UPU, WCL, WCO, WFTU, WHO, WIPO, WMO, WToO, WTO (observer)

GDP - per capita:
purchasing power parity - $8,100 (2005 est.)

GDP - composition by sector:
agriculture: 11.8%
industry: 43.3%
services: 44.9% (2005 est.)

Agriculture - products:
wheat, rice, other grains, sugar beets, fruits, nuts, cotton; dairy products, wool; caviar

Industries:
petroleum, petrochemicals, textiles, cement and other construction materials, food processing (particularly sugar refining and vegetable oil production), metal fabrication, armaments

                                             By the Courtesy of  World Fact Book - Iran and Wikipedia